NORMS FOR RATE ANALYSIS OF RETROFITTING MASONRY BUILDING

NORMS

FOR

RATE ANALYSIS

OF

RETROFITTING

MASONRY BUILDING

Prepared by

Retrofitting Technical Working Group

March 2020

Retrofitting Norms for Rate Analysis

Introduction

The detail damage assessment survey conducted after the 2015 Gorkha earthquake had

identified around 70 thousand houses that could retain their seismic strength through

retrofitting. With the start of the reconstruction phase most of the training and technical

assistance systems promoted for the reconstruction were aimed at new construction only.

The retrofitting construction related manuals only available in June 2017 which provided

retrofit solutions to the beneficiaries of earthquake affected districts along with some

retrofit trainings.

Despite the retrofitting manuals and trainings, retrofitting of houses could not speed up as

compared to the reconstruction. As a consequence, there is no interest from the

beneficiaries and beneficiaries switching or planning to switch from retrofit to

reconstruction causing further delay in recovery/reconstruction process. There are various

reasons for delay in the retrofitting construction process. One of the major reasons is lack

of retrofitting norms for rate analysis in the earthquake affected districts. Other reasons are

lack of proper technical guidance to the engineers and masons in the field and

communication gap from reconstruction stakeholders.

A retrofit technical working group was formed on 20th December 2019 to support the

NRA, CLPIU Building to speed up retrofitting of buildings in earthquake affected areas

through standardization of technical documents, solutions and approaches related to

retrofitting. A number of documents for better community awareness related to retrofitting

have been preparing under the retrofitting technical working group. This group consist of

partner organizations, namely, NSET, Build Change, UNDP and HRRP who are actively

working in retrofitting in the earthquake affected districts of Nepal. Retrofitting Norms

for Rate Analysis is one of the main documents being prepared by the retrofitting technical

working group since the last three months. This document provides basic guidelines of

norms for load-bearing masonry structures.

Objective

This document is prepared in order to support the retrofitting cost analysis of masonry

structures. This is intended to be implemented by the engineers and mid-level technicians.

Moreover, this document could also support the NRA, CLPIU Building to speed up

retrofitting of buildings in earthquake affected areas.

Background

The 2015 Gorkha earthquake had widespread damages, especially in the private housing

sector; more than half the total losses was incurred in private houses. Nearly 900,000

houses have been identified by the National Reconstruction Authority as beneficiaries of

the national reconstruction program, 78,000 of whom are retrofitting beneficiaries. To

fulfill the need for technical assistance to such beneficiaries, the National Reconstruction

Authority led the process and collaborated with several partner organizations for

conduction of various awareness and capacity building activities.

One of the key aspects that need to be considered while undertaking a retrofitting activity

is the cost of the interventions. A general understanding states that any retrofitting activity

would be feasible if the cost of retrofitting falls under 30% of the total construction cost of

the building (except in cases of buildings of historic, cultural or religious values).

Furthermore, as most of the damaged buildings are situated in the rural areas, the cost of

retrofitting is much more significant, owing the economic condition of the target

beneficiaries. As such, a crucial step in implementing any retrofitting process is the

estimation of the cost of such interventions.

Need

The process of strengthening buildings using retrofitting is not new in Nepal. Retrofitting

of buildings started in Nepal in the late 1990s, with school buildings. More than 25 years

later, 300 or more schools have been retrofitted. Over the course of time, the technology

slowly proliferated into the private sector, with several hundreds of private houses being

retrofitted. However, many of these retrofitting interventions were largely carried out RC

frame of brick cement buildings in the urban cities in Kathmandu Valley. Retrofitting of

rural buildings, typically of stone masonry buildings was not a major priority until the 2015

Gorkha earthquake. This led to a serious gap in knowledge, as no standardized norms or

analysis of rates were available for retrofitting interventions. Hence, while rates for works

like brick soling, reinforcements, concreting and plastering were generally adopted from

new construction, rates for more specialized tasks such as plaster scraping, placement of

GI wire mesh and GI wires, anchorage and repair works were not standardized, ad used

randomly. This created an inconsistency in rate analysis and estimation of retrofitting

interventions across the country, with engineers unable to refer to a national standardized

norm.

Process

With the dire need to expedite the process of reconstruction in earthquake affected areas, a

Technical Working Group (TWG) was formed to consolidate and develop various

documents and resource materials to support the NRA CLPIUs and all partner

organizations in retrofitting interventions. Among various objectives and tasks of the TWG

was to standardize norms for retrofitting of masonry buildings using technique as

prescribed in the NRA Repair and Retrofit Manual and retrofitting techniques adopted and

implemented by partner organization. The TWG consisted of engineers from UNDP,

HRRP, NSET, Build Change and CRS, partners that had worked extensively in retrofitting

of partially damaged buildings. The different steps in the consolidation process are as

follows:

Volume of Work

To ascertain actual and practical norms and rates for the different tasks under retrofitting,

various sites were examined and data on manpower and material recorded precisely. The

table in Annex 1 highlights the volume of work referred to for the revision process

Scope and Basis

• The document covers stone and brick masonry buildings (both with mud and cement

mortar) typology for splint and bandage, containment reinforcement (CR) system /

local failure jacketing and strong-back method being implemented by partner

organizations.

• The results are based upon observation of individual line items in a certain time

frame from partner organizations (Build Change, NSET, UNDP and ESS).

Additionally, some components have been adopted as they are in standard

governmental norms for new construction. Further, information is documented in

formats which is in usual practice of government.

• Each item’s rate analysis is calculated by incorporating manpower (skilled /

semiskilled / unskilled), materials, tools (calculation basis/lump sum) and overhead

cost.

• Each man day (md) is considered as 8 hours working time in a day.

• Some changes have been made from observations while preparing analysis,

considering the scenarios which may be different in training and actual work

conditions.

• There are 12 items identified for rate analysis.

TABLE OF CONTENTS 1

Item No. Page No.

A Site Clearance and Protection Works A1-A12 1-6

B Excavation and Backfilling B1-B2 7

C Shoring works C1-C2 8

D Masonry works D1-D6 9-11

E Concrete & Rebar Works E1-E4 12-13

F Formwork F1 14

G Wiremesh Works G1-G6 14-17

H Plaster Works H1-H5 17-19

I Containment/Jacketing I1-I2 21

J Anchorage Works J1-J3 21-22

K Through Concrete, Dowel Works and Timber Splicing K1-K3 22-23

L Replacement of Heavy Gable with Light Material L1-L2 24

M Roof and connection Improvement M1-M3 25-26

Work Group DescriptionDescription Sheet

A

Items Page No. Unit

1 Providing and fixing the 500 gauge polythene sheet 1 NRs. sq.m

2 Removing of existing door and windows shutter and its fixture 1 NRs. No.

3 Demolition of wall BMC and storage within haulage of 10m 2 NRs. cum

4 Demolition of wall BMM and storage within haulage of 10m 2 NRs. cum

5 Demolition of wall SMM and storage within haulage of 10m 3 NRs. cum

6 Demolition of wall SMC and storage within haulage of 10m 3 NRs. cum

7 Demolition of existing PCC flooring 4 NRs. cum

8 Demolition of Rigid floors (reinforced conrete slab) 4 NRs. cum

9 Demolition of roof Light-CGI roofing including truss element 5 NRs. sq.m

10 Demolition of roof Heavy-slate/clay/cement tiles including truss element 5 NRs. sq.m

11 Stripping and Raking of of Exsiting mud plaster from SMM/BMM 6 NRs. sq.m

12 d 6 NRs. sq.m.

B

Items Page No. Unit

1 Earthwork in excavation in ordinary to mixed/hard soil 7 NRs. cum

2 Backfilling Works 7 NRs. cum

TABLE OF CONTENTS 2

FOR ****** DISTRICT

Work Group A : Site Clearance and Protection Works

Rate Analysis

Work Group B : Excavation and Backfilling

Rate Analysis

C

Items Page No. Unit

1 Providing Wooden Props for Shoring purpose 8 NRs. cum

2 Providing Wooden while Shifting of Openings 8 NRs. cum

D

Items Page No. Unit

1 Laying of stone mud mortar masonry wall 9 NRs. cum

2 Laying of brick mud mortar masonry wall 9 NRs. cum

3 Laying of masonry wall of stone in cement mortar 1:6 10 NRs. cum

4 Laying of masonry wall of brick in cement mortar 1:6 10 NRs. cum

5 Flat Brick soling 11 NRs. sqm

6 Stone soling 11 NRs. sqm

E

Items Page No. Unit

1 Providing, mixing and laying P.C.C. in 1:2:4 ratio 12 NRs. cum

2 Providing, mixing and laying R.C.C. in 1:2:4 ratio 12 NRs. cum

3 Providing, mixing and laying R.C.C. in 1:1.5:3 ratio 13 NRs. cum

4 Providing high strength deformed bars (HYSD) of grade Fe:415 13 NRs. metric ton

F

Items Page No. Unit

1 Providing, fitting and fixing standard formwork 14 NRs. sq.m

Work Group C : Shoring works

Rate Analysis

Work Group D : Masonry works

Rate Analysis

Work Group E : Concrete & Rebar Works

Rate Analysis

Work Group F : Formwork

Rate Analysis

G

Items Page No. Unit

1 Cutting and laying SWG10 welded wire mesh and mesh size 50mmx50 mm 14 NRs. sq. m

2 Cutting and laying SWG10 welded wire mesh and mesh size 25mmx25 mm 15 NRs. sq.m

3 Cutting and laying SWG12 welded wire mesh and mesh size 50mmx50mm 15 NRs. sq.m

4 Cutting and laying SWG14 welded wire mesh and mesh size 31 mmx31 mm 16 NRs. KG

5 Cutting and laying SWG12 welded wire mesh and mesh size 25mmx25mm 16 NRs. sq.m

6 Cutting and laying SWG15 welded wire mesh and mesh size 20mm x 20mm 17 NRs. sq.m

H

Items Page No. Unit

1

Cement plaster works over on walls, with cement sand mix (1:4) and 12.5 mm

thick 17 NRs. sq.m

2

Cement plaster works over GI wire mesh / chicken wire mesh on Stone

Masonry walls, with cement sand mix (1:3) and 30 mm thick 18 NRs. sq.m

3


Masonry walls, with cement sand mix (1:3) and 20 mm thick 18 NRs. sq.m

4


masonry walls, with cement sand mix (1:3) and 35 mm thick 19 NRs. sq.m

5


masonry walls, with cement sand mix (1:3) and 40 mm thick 19 NRs. sq.m

Work Group G : Wiremesh Works

Rate Analysis

Work Group H :Plaster Works

Rate Analysis

I

Items Page No. Unit

1 Providing 12G GI Wire @ 100mm c/c 20 NRs. sq.m

2

Fixing 4mm dia G.I wire in specified location attached with each corss link

hook placed at specified interval 20 NRs. Rm

J

Items Page No. Unit

1

Throughout anchoring of SWG 10 (3.15) mm wire at 600 mm c/c with

staggered layout for connection of jacketing mesh on both sides of wall 21 NRs. nos

2

Anchorage of 4.75 mm bar with staggered layout at 600 mm c/c for

connecting splints and bandages on both sides of wall 21 NRs. nos

3

Cast In-situ Concrete Shear Connector for all belts in 450 mm thick wall with

8mm TOR rod and infill of Concrete 1:2:4 22 NRs.

K

Items Page No. Unit

1 Providing 150mm thick and 450mm deep Through concrete 22 NRs. 1 no.

2 Providing 150mm thick and 450mm long dowel 23 NRs. 1 no.

3 Providing the timber splicing 23 NRs. cum

L

Items Page No. Unit

1 Providing wooden frames as light gable 24 NRs. cum

2 Providing and fixing 24 Gauge CGI Sheet as light material. 24 NRs. sq.m

Work Group I : Containment/Jacketing

Work Group L :Replacement of Heavy Gable with Light Material

Rate Analysis

Rate Analysis

Work Group J :Anchorage Works

Rate Analysis

Work Group K :Through Concrete, Dowel Works and Timber Splicing

Rate Analysis

M

Items Page No. Unit

1 Connection of Rafter and Purlin 25 NRs. per connection

2 Connection of sill plate with ring beam 25 NRs. per connection

3 Connection of Ridge Beam and Timber Post 26 NRs. per connection

Work Group M :Roof and connection Improvement

Rate Analysis

A

1

Resources Particulars Unit Quantity Unit Price Total Resources Total

Skilled Md 0.05

Unskilled Md 0.05

Polythene Sheet (500 gauge) sq.m 1.1

Nails

Damage recovery (30% )

Tools (3% labor)

Actual Cost

Overhead Cost (...%)

Rate per 1 sq.m Total Cost

Rs.

A2

Elements Particulars Unit Quantity Unit Price Total Elements Total

Skilled Md 0.25

Unskilled Md 0.25

Skilled Md 0.5

Unskilled Md 0.5


Tools (3% labor)

Actual Cost


Rate per 1 Nos Total Cost

Providing and fixing the 500 gauge polythene sheet with adhesive tape and nail for protection of door/ window frame with its fixtures of (on which shutter

has removed) by covering it, including removing it after completion of the work and cleaning thoroughly all complete as original condition or as per

instruction by the Engineer.

Rate Analysis for 1 sq.m

Manpower

MaterialLs

Removing of existing door or window shutters and its fixtures (not frame) , its safe storage before construction and reinstate it after retrofitting including

cleaning and fixing, all complete as original condition or as per instruction by the Engineer.

Rate Analysis for Nos

Manpower for removing & safe

storage

Labor for reinstate & cleaning

Page 1

A

3

Resources Particulars Unit Quantity Unit Price Total Resources Total

Skilled Md 0

Unskilled Md 2.12


Tools (3% labor)

Actual Cost

Rate per 1 cum Overhead Cost (...%)

Rs. Total Cost

A

4

Resources Particulars Unit Quantity Unit Price Total Resource Total

Skilled Md 0

Unskilled Md 1.06


Tools (3% labor)

Actual Cost


Rate per 1 cum Total Cost

Rs.

Demolition of the existing brick masonry wall in cement mortar and disposing debris including , transportation of debris, cleaning the site etc.

all complete as per drawing details, specification and instruction by the Engineer.

Rate Analysis for 1 Cum

Demolition of the existing brick masonry wall in mud mortar and disposing debris including , transportation of debris, cleaning the site etc. all

complete as per drawing details, specification and instruction by the Engineer.


Manpower

Manpower for demolition and

disposing

Page 2

A

5

Resources Particulars Unit Quantity Unit Price Total Elements Total

Skilled Md 0

Unskilled Md 1.06


Tools (3% labor)

Actual Cost


Rate per 1 Cum Total Cost

Rs.

A

6

Resource Particulars Unit Quantity Unit Price Total Resource Total

Skilled Md 0

Unskilled Md 2.12


Tools (3% labor)

Actual Cost



Rs.

Demolition of the existing stone masonry wall in mud mortar and disposing debris including , transportation of debris, cleaning the site etc. all

complete as per drawing details, specification and instruction by the Engineer.


Demolition of the existing stone masonry wall in cement mortar and disposing debris including , transportation of debris, cleaning the site etc.

all complete as per drawing details, specification and instruction by the Engineer.

Rate Analysis for 1 cum

Manpower

Manpower

Page 3

A

7


Skilled Md 0

Unskilled Md 4


Tools (3% labor)

Actual Cost



Rs.

A

8


Skilled Md 0

Unskilled Md 11


Tools (3% labor)

Actual Cost



Rs.

Demolition of existing P.C.C. slab in perfect line, level and disposing the debris including transportation of debris, cleaning the site all complete

as per drawing, specification and instruction by the Engineer.


Demolition of existing R.C.C. slab in perfect line, level and disposing the debris including transportation of debris, cleaning the site all complete

as per drawing, specification and instruction by the Engineer.


Manpower

Manpower

Page 4

A

9


Skilled Md 0.03

Unskilled Md 0.04


Tools (3% labor)

Actual Cost



Rs.

A

10


Skilled Md 0.054

Unskilled Md 0.081


Tools (3% labor)

Actual Cost



Rs.

Manpower

Manpower

Dismantel of existing roof truss with CGI sheet, surface cleaning and disposing the debris including transportation, etc all complete as per

drawing details, specification and instruction by the Engineer.


Dismantel of existing tile roofing , surface cleaning and disposing the debris including transportation, etc all complete as per drawing details,

specification and instruction by the Engineer.


Page 5

A

11

Resources Particulars Unit Quantity Unit Price Total Resource Total

Manpower for scrapping Unskilled Md 0.06

Manpower for raking & cleaning Unskilled Md 0.06


Tools (3% labor)

Actual Cost



Rs.

A

12


Manpower for scrapping Unskilled Md 0.108

Manpower for raking & cleaning Unskilled Md 0.108


Tools (3% labor)

Actual Cost



Rs.


Stripping off the existing mud plaster on the masonry wall, raking out the mud mortar to a depth of 10 mm at joint, surface cleaning and

disposing the debris including transportation, etc all complete as per drawing details, specification and instruction by the Engineer.


Stripping off the existing cement plaster on the Masonry wall, raking out the cement mortar to a depth of 10 mm at joint, surface cleaning and

disposing the debris including transportation, etc all complete as per drawing details, specification and instruction by the Engineer.

Page 6

B

1


Skilled Md 0

Unskilled Md 0.8


Tools (3% labor)

Actual Cost



Rs.

B

2


Skilled Md 0

Unskilled Md 0.5


Tools (3% labor)

Actual Cost



Rs


Earthwork in excavation in ordinary to mixed/hard soil in foundation including dressing of sides and proper compaction to trench bed,

disposing of excess soil all complete as per drawing, specification and instructions by the Engineer.

Manpower

Backfilling Works


Manpower

Page 7

C

1


Skilled Md 7.5

Unskilled Md 3.8

Timber cum 1.1

Tools (3% labor)

Actual Cost


Rate per cum Total Cost

Note: One element will be used

for 3 times.

C

2


Skilled Md 4.9

Unskilled Md 4.9

Timber cum 1.1

Nails (2 inches) kg 1.2

Tools (3% labor)

Actual Cost



Rs.Note: One element will be used

for 3 times.

Providing Wooden Props for Shoring of Walls and Floors (Raker [email protected] spacing, Wall [email protected] spacing,

Cleat=300mmx100mmx75mm)


Providing Timber shoring while Shifting of Openings ( 125*125 sq mm horizontal wooden posts with vertical support @ 1 m spacing, Vertical

Posts @ 100 *100 sq mm )


Manpower

Manpower

Page 8

D

1


Skilled Md 1

Unskilled Md 2.25

Block Stone cum 1

Bond Stone cum 0.1

Soil cum 0.42

Water litre 70

Tools (3% labor)

Actual Cost



D

2


A)Skilled Md 1

B)Unskilled Md 1.7

C)Unskilled Md 0.2

Brick nos 560

Soil cum 0.42

Water littre 100

Tools for Scaffolding 3% of C)

Tools (3% labor)

Actual CostOverhead Cost (...%)


Rs.

Manpower

Material

Manpower

Material

Stone masonry work in mud mortar including supply of hard stone blocks preparing mud mortar and construction of the wall upto 5m high

haulage distance upto 30m


Good quality local chimney made brick work in mud mortar in perfect line, level and finishing including , curing, raking out green mortar

from joints and cleaning the brick face before stopping the work and proper bonding with existing masonry all complete as per drawing,



Page 9

D

3


Skilled Md 1.95

Unskilled Md 2.06

Cement MT 0.07

Sand(river) cum 0.3

Block stone cum 1.1

bond stone cum 0.1

Water litre 150

Tools (3% labor)

Actual Cost



Rs.

D

4


A) Skilled Md 1.5

B) Unskilled Md 2.2

C) Unskilled Md 0.7

Cement bags 1.4

Brick nos 560

Sand cum 0.3

water litre 100

Tools for Scaffolding (3% of C)

Actual Cost



Rs.

Stone masonry work in cement mortar including supply of hard stone blocks preparing mud mortar and construction of the wall upto 5m high

haulage distance upto 30m


Good quality local chimney made brick work in cement sand mortar (1:6) in perfect line, level and finishing including , curing, raking out green

mortar from joints and cleaning the brick face before stopping the work and proper bonding with existing masonry all complete as per drawing,



Material

Manpower

Manpower

Material

Page 10

D

5


Skilled Md 0.5

Unskilled Md 1

Brick nos 420

Sand(river) cum 0.71

Tools (3% labor)

Actual Cost



Rs.

D

6


Skilled Md 1

Unskilled Md 3.5

Stone cum 1.1

Sand cum 0.25

Tools (3% labor)

Actual Cost



Rs.

Dry stone laying (soling)

Dry flat brick soiling



Manpower

Material

Manpower

Material

Page 11

E

1


Skilled Md 1

Unskilled Md 4

Cement Bags 6.4

Aggregate cum 0.86

Sand cum 0.445

Water ltr 150

Actual Cost



Rs.

E

2


Skilled Md 0.8

Unskilled Md 7

Cement Bags 6.4

Aggregate cum 0.86

Sand cum 0.445

Water ltr 150

Actual Cost



Rs.

Material

Providing, mixing and laying P.C.C. in 1:2:4 ratio for foundation, beam with stone aggregate(10/ 20mm) down with proper compaction and

completion to perfect line, level and finishing including proper curing all complete as per drawing, specification and instruction by the Engineer.


Manpower

Manpower

Material

Providing, mixing and laying R.C.C. in 1:2:4 ratio for foundation, beam with stone aggregate(10/ 20mm) down with proper compaction and



Page 12

E

3


Skilled Md 0.8

Unskilled Md 7

Cement Bags 8

Aggregate cum 0.86

Sand cum 0.43

Water ltr 200

Tools (3% labor)

Actual Cost



Rs.

E

4


Skilled Md 12

Unskilled Md 12

TMT Rod Metric ton 1.05

Binding Wire kg 10

Actual Cost


Rate per 1 metric ton Total Cost

Rs.

Material

Providing high strength deformed bars (HYSD) of grade Fe:415 approved reinforcement confirming to IS: 1786 - 1985 for R.C.C work and

approved bar bending schedule including straightening, cutting, bending, placing and binding in position by binding wires all complete as per

drawing, specification and instruction by the Engineer.

Rate Analysis for 1 metric ton

Manpower

Material

Providing, mixing and laying R.C.C. in 1:1.5:3 ratio for foundation, beam with stone aggregate(10/ 20mm) down with proper compaction and



Manpower

Page 13

F

1


Skilled Md 0.267

Unskilled Md 0.4

Wooden Form cum 0.07

Nails kg 0.25


Tools (3% labor)

Actual Cost



Rs. 0

G

1


Skilled Md 0.09

Unskilled Md 0.12

Material Wiremesh sq.m 1.1

Tools (3% labor)

Actual Cost



Rs.

Material

Manpower

Providing, fitting and fixing standard formwork of shuttering local wood including all necessary metal/wooden props, bracing, wedges and nails

etc. and careful removal of form works at approved time for all type of R.C.C. works all complete as per specification and instruction by the

Engineer.


Manpower

Providing, cutting and laying SWG10 welded wire mesh and mesh size 50x50 mm including anchoring it on the wall with 4.75mm bar by

drilling and fixing with cement slurry as per drawing details, specification and instruction by the Engineer.


Page 14

G

2


Skilled Md 0.09

Unskilled Md 0.12


Tools (3% labor)

Actual Cost



Rs.

G

3


Skilled Md 0.09

Unskilled Md 0.12


Tools (3% labor)

Actual Cost



Rs.

Manpower

Providing, cutting and laying SWG10 welded wire mesh of mesh size 25x25m as per drawing details, specification and instruction by the

Engineer.


Manpower

Providing, cutting and laying SWG12 welded wire mesh and mesh size 50x50 mm including anchoring it on the wall with 4.75mm bar by

drilling and fixing with cement slurry as per drawing details, specification and instruction by the Engineer.


Page 15

G

4


Skilled Md 0.12

Unskilled Md 0.23


Tools (3% labor)

Actual Cost



Rs.

G

5


Skilled Md 0.09

Unskilled Md 0.12


Tools (3% labor)

Actual Cost



Rs.


Providing, cutting and laying SWG12 welded wire mesh of mesh size 25mmx25mm as per drawing details, specification and instruction by the

Engineer


Providing, cutting and laying SWG14 (2.03mm) welded wire mesh of mesh size 31mmx31mm as per drawing details, specification and

instruction by the Engineer

Manpower

Manpower

Page 16

G

6


Skilled Md 0.09

Unskilled Md 0.12


Tools (3% labor)

Actual Cost



Rs.

H

1


Skilled Md 12

Unskilled Md 16

Cement bags 10.8

Sand cum 1.5

Tools (3% labor)

Actual Cost



Rs.

Providing, cutting and laying SWG15(1.83mm) welded wire mesh of mesh size 20x20m as per drawing details, specification and instruction by

the Engineer.


Cement plaster works over on walls, with cement sand mix (1:4) and 12.5 mm thick or as per existing plaster thickness in perfect line, level and

plumb, making grooves on boundary of existing plaster and new plaster including cleaning and wetting the surface and curing all complete as

per specification and instruction by the Engineer.


Manpower

Manpower

Material

Page 17

H

2


Skilled Md 16

Unskilled Md 16

Cement bags 30

Sand cum 3

Tools (3% labor)

Actual Cost



Rs.

H

3


Skilled Md 15

Unskilled Md 15

Cement bags 20

Sand cum 2Tools (3% labor)

Actual Cost



Rs.

Manpower

Material

Manpower

Material

Cement plaster works over GI wire mesh / chicken wire mesh on Brick walls, with cement sand mix (1:3) and 30 mm thick


Cement plaster works over GI wire mesh / chicken wire mesh on Brick walls, with cement sand mix (1:3) and 20 mm thick


Page 18

H

4


Skilled Md 0.391

Unskilled Md 0.781

Cement bags 0.4368

Sand cum 0.046

Tools (3% labor)

Actual Cost



Rs.

H

5


Skilled Md 16

Unskilled Md 35

Cement bags 42

Sand cum 4.29

Tools (3% labor)

Actual Cost



Rs.


Manpower

Material

Cement plaster works over GI wire mesh / chicken wire mesh on Stone masonry walls, with cement sand mix (1:3) and 35 mm thick

40mm (Double Layer) Plastering work @ 1:3 Cement Mortar at the location of welded wiremesh and GI Wire jacketing (First layer of 25mm

and second layer of 15mm.)


Manpower

Material

Page 19

I

1


Skilled Md 0.06

Unskilled Md 0.06

Material 12G GI Wire kg 1.012

Tools (3% labor)

Actual Cost



Rs.

I

2


Skilled Md 0.179

Unskilled Md 0.357

Material 4mm GI Wire kg 1

Tools (3% labor)

Actual Cost


Rate per 1 rm Total Cost

Rs.

Providing 12G GI Wire @ 100mm c/c for prevention of local failure

Rate Analysis for 1 sqm area

Rate Analysis for 10 rm

Manpower

Fixing 4mm dia G.I wire in specified location attached with each corss link hook placed at specified interval

Manpower

Page 20

J

1


Skilled MD 0.017

Unskilled MD 0.017

Materials SWG 10(3.15) mm wire kg 0.09

Drilling Machine

Drill bit

Actual Cost


Rate per 1 no. Total Cost

Rs.

J

2


Skilled MD 0.025

Unskilled MD 0

Cement Bags 0.002

Sand cum 0.0003

4.75 mm rebar kg 0.03

Drilling Machine

Drilling Bit

Actual Cost



Rs.

Anchorage of 4.75 mm bar with staggered layout at 600 mm c/c for connecting splints and bandages on both sides of wall

Rate Analysis for 1 nos.

Throughout anchoring of SWG 10 (3.15) mm wire at 600 mm c/c with staggered layout for connection of jacketing mesh on both sides of wall


Material

Tools (3% labor)

Manpower

Tools

Manpower

Page 21

J

3


Skilled MD 0.056

Unskilled MD 0.083

Steel -8mm dia. Kg 0.16

Cement Bag 0.011

Sand cum 0.001

Aggregate cum 0.002

Actual Cost



Rs.

K

1


Skilled Md 0.5

Unskilled Md 2.5

Cement bags 0.7

Sand cum 0.04

Aggregate cum 0.08

Rebar (7mm) kg 2

Actual Cost



Rs.

Manpower

Material

150mm thick and 450mm deep Through concrete placed in existing wall to prevent wall delamination


Manpower

Material

Cast In-situ Concrete Shear Connector for all belts in 450 mm thick wall with 8mm TOR rod and infill of Concrete 1:2:4 (Include making hole

of 4"*4")


Page 22

K

2


Skilled Md 0.6

Unskilled Md 2.5

Cement bags 1

Sand cum 0.04

Aggregate cum 0.08

Rebar (12mm) kg 11

Actual Cost



Rs.

K

3


Skilled Md 31

Unskilled Md 3

Soft Wood cum 1.1

12 mm bolt/Threaded rod kg 183

Nuts and washers each nos. 610

Drilling Works (1% of total cost)

Actual Cost



Rs.

Material

Manpower

Material

Providing 150mm thick and 450mm long dowel for anchoring the new element with the existing element using rebar and concrete


Manpower

Providing the timber splicing for the wooden posts with splicing member


Page 23

L

1


Skilled Md 16.82

Unskilled Md 5.61

Timber cum 1.1

Nails kg 16.82

Tools (3% labor)

Actual Cost



Rs.

L

2


Skilled Md 1.1

Unskilled Md 1.25

CGI Sheet (24 Gauge) sqm 12

Nails kg 0.5

Washer nos 55

Tools (3% labor)

Actual Cost



Rs.

Manpower

Material

Manpower

Material

Providing wooden frames as light gable


Providing and fixing 24 Gauge CGI Sheet as light material.


Page 24

M

1


Manpower Unskilled Md 1

Material 12G GI Wires kg 1.2

Tools (3% labor)

Actual Cost


Rate per connection Total Cost

Rs.

M

2


Skilled Md 1

Unskilled Md 2

Plain GI Sheet sqm 4.5

Nails (1.5") kg 1.5

Tools (3% labor)

Actual Cost



Rs.

Connection of rafter and purlin with 12G GI Wire

Rate Analysis for 40 connections

Connection of sill plate with ring beam (1000mm x 75mm double folded 24 Gauge Plain GI Sheet)


Manpower

Material

Page 25

M

3


Skilled Md 0.25

Unskilled Md 1

Plain GI Sheet sqm 0.412

Nails (1.5") kg 0.5

Tools (3% labor)

Actual Cost



Rs.

Connection of Ridge Beam and Timber Post with Plain GI Strap (24 Gauge)


Manpower

Material

Page 26

CALCULATION/OBSERVATION

FOR

NORMS CALCULATION

H3

Area (sq.m) 100

Thickness (mm) 20

Ratio 1:3

Plaster volume (cum)= 2

Increasing plaster volume by 30% for dry volume

Total volume= 2.6

cum kg bags

Cement = 0.65 0.65 936 19

Adding 10% for slurry and wastage 21

Sand= 1.95 cum

Adding 10% for wastage 2.145 cum

Skilled Manpower 16

Unskilled Manpower 16

On observation it was found that one mason in a day can

plaster a wall panel of height 7 feet and width 10 feet,

which is equal to around 68 sq ft(6.25 sq m). Hence, for

100 sqm 16 MDs are required.

The unskilled manpower is required to support the skilled

one in carrying and preparing 1:3 rich cement mortar using

cement, sand, water and necessary tools like spade. Further,

the manpower is also resposible for spraying slurry and

supplying/hauling of prepared material to the skilled one.

20mm (Double Layer) Plastering work @ 1:3 Cement Mortar at the location of welded wiremesh and GI Wire jacketing

H2

Area (sq.m) 100

Thickness (mm) 30

Ratio 1:3



Total volume= 3.9

Cement = 0.975 0.975 1404 29


Sand= 2.925 cum


Skilled Manpower 15


The unskilled manpower is required to support the skilled

one in carrying and preparing 1:3 rich cement mortar using

cement, sand, water and necessary tools like spade. Further,

the manpower is also resposible for spraying slurry and

supplying/hauling of prepared material to the skilled one.

On observation it was found that one mason in a day can

plaster a wall panel of height 7 feet and width 10 feet,

which is equal to around 72 sq ft(6.66 sq m). Hence, for

100 sqm 15 MDs are required.


G1

Skilled Manpower 0.09 MD

Unskilled Manpower 0.12 MD

Providing, cutting and laying SWG10 welded wire mesh and mesh size 50x50 mm as per drawing details, specification

and instruction by the Engineer.

While cutting and installing a GI Welded Wire Mesh over

surface of wall, it has been observed that skilled manpower

is necessary to intially place, temporarily anchor and help

other unskilled masons. For all these works total time taken

for 1 sqm area is 44 minutes.

Unskilled Manpower are required to remove the existing

internventions like joist, roofing materials, nailing wire

mesh over walls and other purposes. For all these works

total time taken for 1 sqm area is around 58 to 60

minutes.

J2

Total time required for preparation, placing and fixing of

anchorages.

For preparation of anchorage bar 4 minutes

For drilling of holes 2 minutes

For placing and tampering rich cement mortar inside the hole 6 minutes

Total time required 12 minutes

Hence, converting it into man days, as skilled manpowers are used:

Skilled manpower required 0.025 MD

Drilling Works

Drilling Machine 3

Drilling Bit 2

Anchorage of 4.75 mm bar with staggered layout at 600 mm c/c for connecting splints and bandages on both sides of

wall

Rate of renting each drilling machine is around

NPR 500 per day. Such machines are used for

around 8-10 days and their are around 1000

anchorage holes in an average Nepali building.

Hence ((500*8)/1000) gives about Npr 3 per

hole for drilling machine. Likewise, for drilling

bit, an average bit when made locally from rods

will cost NPR 800. Since 3-4 such bits are

sufficient for a building in normal cases, per

hole cost for 1000 holes is around NPR 2.

J1

Total time required for preparation, placing and fixing of

anchorages.

For drilling of holes 8 minutes

For placing and tampering rich cement mortar inside the hole 8 minutes

Total time required 16 minutes

Hence, converting it into man days, as skilled manpowers are used:

Skilled manpower 0.0166667 MD

Unskilled manpower 0.0166667 MD

Drilling Works

Drilling Machine 3

Drilling Bit 2

I1

Skilled Manpower 0.06

Unskilled Manpower 0.06

For quanity of material for which wire is placed at 100 mm c/c

a sq m area the length is 23 m. (1 extra m is for binding

works)

Rate of renting each drilling machine is around

NPR 500 per day. Such machines are used for

around 8-10 days and there are around 1000

anchorage holes in an average Nepali building.

Hence ((500*8)/1000) gives about Npr 3 per

hole for drilling machine. Likewise, for drilling

bit, an average bit when made locally from rods

will cost NPR 800. Since 3-4 such bits are

sufficient for a building in normal cases, per

hole cost for 1000 holes is around NPR 2.

Providing 12G GI Wire @ 100mm c/c for prevention of local failure

While cutting and installing a GI wire over surface of wall,


Throughout anchoring of SWG 10 (3.15) mm wire at 600 mm c/c with staggered layout for connection of jacketing mesh

on both sides of wall

In General this is done by 2 set of masons who

sit at inner and outer side of walls.

Divided the number into a skilled and unskilled

masons

C1

No. of Raker (100mmx100mmx2440mm) 4 no.

Wall Plate (100mmx100mmx3962mm) 4 no.

Cleat(75mmx100mmx300mm) 4 no.

Total volume of timber 0.27 cum

Skilled 2 Md

Unskilled 1 Md

For 1 cum of timber shoring 1 cum

Timber 1.1 cum

Skilled 7.5 Md

Unskilled 3.8 Md

C2

Assuming length of shoring = 4m and height of floor = 2m

Vertical Member (100mmx100mmx2000mm) 8 no.

Horizontal Member (125mmx125mmx4000mm) 4 no.

Total volume of timber 0.41 cum

Skilled 2 Md

Unskilled 2 Md

Nails 0.5 kg

For 1 cum of timber shoring 1 cum

Timber 1.1 cum

Skilled 4.9 Md

Unskilled 4.9 Md

Nails 1.2 kg

Providing Wooden Props for Shoring of Walls and Floors

Assuming elevation area of shoring = (10m x 5m i.e 10m length of building

and 5m height of building)

Providing Wooden while Shifting of Openings ( 125*125 sq mm

horizontal wooden posts with vertical support @ 1 m spacing, Vertical

Posts @ 100 *100 sq mm )

G2



G6




interventions like joist, roofing materials, nailing wire mesh over

walls and other purposes. For all these works total time taken for 1

sqm area is around 58 to 60 minutes.

Providing, cutting and laying SWG15 welded wire mesh and mesh size 20x20 mm as per drawing details, specification and

instruction by the Engineer.

While cutting and installing a GI Welded Wire Mesh over surface of

wall, it has been observed that skilled manpower is necessary to

intially place, temporarily anchor and help other unskilled masons.

For all these works total time taken for 1 sqm area is 44 minutes.

Providing, cutting and laying SWG10 welded wire mesh and mesh size 25x25 mm as per drawing details, specification

and instruction by the Engineer.

While cutting and installing a GI Welded Wire Mesh over surface of

wall, it has been observed that skilled manpower is necessary to

intially place, temporarily anchor and help other unskilled masons.

For all these works total time taken for 1 sqm area is 44 minutes.


interventions like joist, roofing materials, nailing wire mesh over

walls and other purposes. For all these works total time taken for 1

sqm area is around 58 to 60 minutes.

H1

Area (sq.m) 100

Thickness (mm) 12.5

Ratio 1:4

Plaster volume (cum)= 1.25


Total volume= 1.6875

cum kg bags

Cement = 0.3375 0.3375 486 9.72

Adding 10% for slurry and wastage 10.692

Sand= 1.35 cum


Skilled Manpower 12


Cement plaster works over on walls, with cement sand mix (1:4) and 12.5 mm thick

On observation it was found that one mason in a day can plaster a

wall panel of height 9 feet and width 10 feet, which is equal to

around 90 sq ft(8.36 sq m). Hence, for 100 sqm 12 MDs are required.

The unskilled manpower is required to support the skilled one in

carrying and preparing 1:4 rich cement mortar using cement, sand,

water and necessary tools like spade. Further, the manpower is also

resposible for spraying slurry and supplying/hauling of prepared

material to the skilled one.

H5

Area (sq.m) 100

Thickness (mm) 40

Ratio 1:3



Total volume= 5.2

cum kg bags

Cement = 1.3 1.3 1872 38


Sand= 3.9 cum


Skilled Manpower 16



On observation it was found that one mason in a day can plaster a

wall panel of height 7 feet and width 10 feet, which is equal to

around 70 sq ft(6.51 sq m). Hence, for 100 sqm 16 MDs are required.

The unskilled manpower is required to support the skilled one in

carrying and preparing 1:3 rich cement mortar using cement, sand,

water and necessary tools like spade. Further, the manpower is also

resposible for spraying slurry and supplying/hauling of prepared

material to the skilled one.

K1

Concrete Work For one no.

Volume (cum) 0.01

Ratio (Mix=M20) 1:1.5:3

Skilled 0.01 Md

Unskilled 0.06 Md

Cement 0.06 bags

Sand 0.003 cum

Aggregate 0.01 cum

Rebar Work For one no.

7mm rebar length required 0.565 m

Unit weight (kg/m) 0.30

Total kg 0.17 kg

Skilled 0.002 Md

Unskilled 0.002 Md

Rebar (7mm) 0.18 kg

Creating Holes in existing wallls for placing through concrete

Skilled 0.04 Md

Unskilled 0.19 Md

Total Material and Labour Required For 10 no. Factor

Skilled 0.05 Md 0.50 1.00 0.50

Unskilled 0.25 Md 2.50 1.00 2.50

Cement 0.06 bags 0.64 1.10 0.70

Sand 0.003 cum 0.03 1.10 0.04

Aggregate 0.01 cum 0.07 1.10 0.08

Rebar (7mm) 0.18 kg 1.79 1.10 1.97

150mm thick and 450mm deep Through concrete placed in existing wall to prevent wall delamination

K2

Concrete Work For one no.

Volume (cum) 0.01

Ratio (Mix=M20) 1:1.5:3

Skilled 0.01 Md

Unskilled 0.06 Md

Cement 0.06 bags

Sand 0.003 cum

Aggregate 0.01 cum

Rebar Work For one no.

12mm rebar length required 0.99 m

Unit weight (kg/m) 0.89

Total kg 0.88 kg

Skilled 0.011 Md

Unskilled 0.011 Md

Rebar (12mm) 0.92 kg

Creating Holes in existing wallls for placing dowels

Skilled 0.04 Md

Unskilled 0.18 Md

Total Material and Labour Required For 10 no. Factor

Skilled 0.06 Md 0.60 1.00 0.60

Unskilled 0.25 Md 2.50 1.00 2.50

Cement 0.06 bags 0.64 1.10 0.70

Sand 0.003 cum 0.03 1.10 0.04

Aggregate 0.01 cum 0.07 1.10 0.08

Rebar (12mm) 0.92 kg 9.24 1.10 10.16

150mm thick and 450mm long dowel for anchoring the new element with the existing element using rebar and concrete

K3

Soft Wood (730mm x 150mm x 75mm x 2)

Volume 0.0164 cum

12mm bolt/threaded rod 3.00 kg

Nut/Washer 10.00 Nos.

Skilled 0.500 Md

Unskilled 0.04 Md

For 1 cum of Timber

Volume 1.1 cum

12mm bolt/threaded rod 183 kg

Nut/Washer 610 nos

Skilled 31 Md

Unskilled 3 Md

L1

Creating timber light gable frame (50mmx100mm)

Vertical(50mmx100mmx750mmx6no.) 0.0225 cum

Horizontal(50mmx100mmx2500mmx3no.) 0.0375 cum

Inclined(50mmx100mmx2920mmx2no.) 0.0292 cum

Total on two sides 0.1784 cum

Skilled 3 Md

Unskilled 1 Md

Nails 3 kg

For 1 cum of Timber

Timber 1.1 cum

Skilled 16.82 kg

Unskilled 5.61 nos

Nails 16.82 Md

According to site

experience

Providing wooden frames as light gable

Timber splicing for the wooden posts with splicing member

H5

Area (sq.m) 100

Thickness (mm) 40

Ratio 1:3


Increasing plaster volume by 30% for

dry volume

Total volume= 5.2

cum kg bags

Cement = 1.3 1.3 1872 38


Sand= 3.9 cum


G4

Skilled Manpower 0.06 MD Vertical seismic

strap 200 mm ( 8"

approx) wide

Unskilled Manpower 0.18 MD

40mm (Double Layer) Plastering work @ 1:3 Cement Mortar at the location of welded

wiremesh and GI Wire jacketing

Providing, cutting and laying SWG10 welded wire mesh and mesh size 31x31 mm as per

drawing details, specification and instruction by the Engineer.

While cutting and installing a GI Welded Wire Mesh

over surface of wall, it has been observed that skilled

manpower is necessary to intially place, temporarily

anchor and help other unskilled masons. For all these

works total time taken for 1 sqm area is 28 to 30

minutes.

Unskilled Manpower are required to remove the

existing internventions like joist, roofing materials,

nailing wire mesh over walls and other purposes. For

all these works total time taken for 1 sqm area is

around 88 to 90 minutes.

Annex 1: Volume of work referred for determination of retrofitting norms

S.N. Line Items Unit TOTAL

1 Labor for removing and Safe Storage LS 16

2

Demolition of the staircase and disposing debris including,

transportation of debris, cleaning the site etc. all complete as per

drawing details, specification and instruction by the Engineer. LS

12

3

Demolition of existing P.C.C. Floor in perfect line, level and

disposing the debris including transportation of debris, cleaning the

site all complete as per drawing, specification and instruction by

the Engineer. cum

14.29

4

Stripping off the existing mud plaster on the wall, raking out the

mud mortar to a depth of 10 mm at joint, surface cleaning and

disposing the debris including transportation, etc all complete as per

drawing details, specification and instruction by the Engineer. sqm

3222.06

5

Earthwork in excavation in ordinary to mixed/hard soil in

foundation including dressing of sides and proper compaction to

trench bed, disposing of excess soil all complete as per drawing,

specification and instructions by the Engineer. cum

60.75

6 Backfilling works after completion of concreting works cum

38.46

7

Providing and laying flat stone soling with voids filled with sand in

foundation in line and level all complete as per drawing,

specification and instruction by the Engineer. sqm

80.95

8

Providing, mixing and laying P.C.C. in 1:1.5:3 ratio for foundation,

flooring, beam with stone aggregate 20mm down with proper

compaction and completion to perfect line, level and finishing

including proper curing all complete as per drawing, specification

and instruction by the Engineer. cum

17.248

9

Providing, fitting and fixing standard formwork of shuttering local

wood including all necessary metal/wooden props, bracing, wedges

and nails etc. and careful removal of form works at approved time

for all type of R.C.C. works all complete as per specification and

instruction by the Engineer. LS

16

10

Providing, cutting and laying SWG12 welded wire mesh and mesh

size 50x50 mm including anchoring it on the wall with 4.75mm bar

by drilling and fixing with cement slurry as per drawing details,


455.82

11

Providing, cutting and laying SWG10 welded wire mesh and mesh

size 50x50 mm including anchoring it on the wall with 4.75mm bar

by drilling and fixing with cement slurry as per drawing details,


1822.35

12

Providing high strength deformed bars (HYSD) of grade Fe:415

approved reinforcement confirming to IS: 1786 - 1985 for R.C.C

work and approved bar bending schedule including straightening,

cutting, bending, placing and binding in position by binding wires

all complete as per drawing, specification and instruction by the

Engineer. MT

1.96

13 SWG 12 Wire mesh making and jackting with mesh size 100mm

*100mm sqm 1439

14 4.75mm anchorage rod kg 995.219

15 SWG 10(3.24mm)G.I wire @600 c/c for connecting inner and outer

mesh. MT 1.22

16

Cement plaster works over GI wire mesh and jacketing part of

whole outer surface of wall with cement sand mix (1:3) and 30 mm

thick or as per existing plaster thickness in perfect line, level and

plumb, making grooves on boundary of existing plaster and new

plaster including cleaning and wetting the surface and curing all

complete as per specification and instruction by the Engineer. sqm

1599.25

17

Cement plaster works over GI wire mesh and jacketing portion of

inner wall with cement sand mix (1:3) and 20 mm thick or as per

existing plaster thickness in perfect line, level and plumb, making

grooves on boundary of existing plaster and new plaster including

cleaning and wetting the surface and curing all complete as per


1623.785

18 75 mm thick PCC(1:2:4) for floor finish in the excavated part on

floor for tie beam sqm 102.44

19 Addition of cross walls according to necessary design conditions cum 8.57

20 Scaffolding Works No. 16

Date post:	15-Feb-2022
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NORMS FOR RATE ANALYSIS OF RETROFITTING MASONRY BUILDING

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